69169...91181 (271-digits)

This number is a probable-prime (likely to be a prime but we have not (re-)proven it on this site).

         6 9169690696 8889681896 8089668996 6199660996 1819611196 1019608096
0109600091 9861191611 9061188811 8181180811 6891161911 6091118111 1111110111
0801101011 0001996698 8696969116 9006896888 8886988118 8008696968 8966996119
6009196118 8116911111 1001986916 9068888188 0868961960 9181111101 9688691181

Just showing those entries submitted by 'Bajpai': (Click here to show all)

The smallest prime greater than a googol formed from the reverse concatenation of first n positive strobogrammatic numbers, (n=67). [Bajpai]